Trolley-line hanger.



G. 'H. ROBERTSON.

TROLLEY'LI'NE HANGER.

APPLICATION FILED DEC. 26, 1914 Patented Malian, 1915.

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TROLLEY-LINE. HANGER.

Specification of Letters Patent.

Patented llllar. Sill, 19115..

Application filed. December 2'6, 1914i. Serial No. 879,192.

To all whom it may concern Be it known that l, CHAnLns H. Ronnn'r- SON,a citizen of the United States, residing at Peoria, in the county ofPeoria and State of llllinois, have invented a new and usefulTrolley-Line Hanger, of which the follow ing is a specification.

The invention relates primarily to electrictrolley lines of the wellknown catenary construction.

The purpose of the invention is to provide improved connecting devicesadapted to connect the trolley wire with and support it on the catenaryor messenger wire, said connecting devices being so constructed andarranged that they will normally be movable on the messenger wireresponsive to the contraction or expansion of the trolley wire and incase of breakage of the trolley wire will instantly and firmly grip thea messenger wire to prevent the sliding of the connecting devices on themessenger wire, thereby preventing any considerable longitudinalmovement of the sections of the broken trolley WlIG relative to themessenger wire, thus averting the grounding and consequent burning ofconsiderable lengths of the trolley wire. The invention is illustratedin the annested drawing, to which reference is hereby made and ishereinafter particularly de scribed and finally recited in the claims.

Figure l is a diagrammatic view of a section of a trolley line embodyingmy invention; Fig. 2 is a side elevation of one hanger and connections;and Fig. 3 is a vertical section on the line X X of l igl 2. Similarreference characters designate like parts inthe difierent views Thecatenary or messenger wire 1 is sup-.

ported on mast arms 2, which are rigidly till connected with suitablyspaced poles or posts 3 in line with each other. Hanger-s,

designated as a whole by the letter A, are connected with the messengerwire 1 as hereinafter described. There will preferably be three hangersbetween each pair of poles, a relatively short central. hanger being atthe lowest point of the catenary and midway between the poles, andlonger hangers, on each side of the central hanger, as shown. The

hangers support the trolley wire 4 in a horizontal position. The hangersare preferably malleable castings and are all alike so a description ofone will suffice for all.

A. hanger of preferable form comprises a box loop 5. having parallelsides spaced apart to accommodate the messenger wire 1 and thesuspension bar 6. A bolt 7 pivotally connects the bar 6 with the boxloop 5. The upper part 6* of the bar 6 is broadened and curved andprovided with serrations 6 as shown. When the suspension bar 6 is in avertical position the serrations 6 will be disengaged from the messengerwire it and the box loop 5 will he loose on the wire. The lower end ofthe suspension bar 6 is pivotally connected with the jaws 8 by'a bolt 9,kept is placed by a cotter pin 10. The jaws 8 are connected by screws 12and have internal longitudinal flanges 8 adapted to engage inlongitudinal grooves 4 in the trolley wire 4. The flanges 8 serve tosupport the trolley wire so that the lower part of the wire will presenta smooth continuous surface with which the trolley running on the wirewill contact.

Prior to my invention trolley lines em PlOYIIIg caten'ary constructionhave used directions on the messenger wire, thus causing looping of thetrolley wire between'its supports and the accumulation of excessiveweight on one or more of the hangers, resulting in the breaking of thehanger or hangers, or the breaking of the messenger wire; andthis edhctis cumulative, so that a single breaking of the trolley wire will oftenresult'in the breaking oi a number of hangers, the breaking ordismounting of a number of sections of the messenger wire and thegrounding oi? considerable lengths of the trolley wire,thus disablingthe system and enhancing the cost or? repair and replacement. A primepurpose of the present invention is to obviate this objection.

The operation of the mechanism is as follows: Immediately upon thebreaking of the trolley wire its parted sections will pull on thehangers with which they are respectively connected to cause theright-hand hanger to oscillate to the right and grip the messenger wireto stop further movement of the right hand section and to cause the lefthand hanger to oscillate to the left and grip the messenger wire to stopfur- A serious objection to that Till) till lit

llllll ther movement of the left-hand section; thus preventing saggingor looping of the trolley wire and the accumulation of excessive weighton any hanger or on any part of the messenger wire.

I do not restrict my claims to the precise construction shown anddescribed since it is obvious that various minor modifications of theconstruction may be employed within the scope of my invention.

Having fully described my invention, I claim as new:

1. A hanger comprising wire-supporting means adapted to support atrolley wire; a suspension device pivotally connected with saidwire-supporting means and having a part efiective to grip a messengerwire upon the oscillation of the suspension device; means for supportingsaid suspension device on a messenger wire; and means pivotallyconnecting said suspension device with the means supporting it on themes:

senger wire.

2. In an apparatus of the class described, the combination of amessenger Wire; loops mounted on the messenger wire; suspension devicespivotally connected with the loops respectively and each having a memberadapted to grip the messenger wire upon the oscillation of saidsuspension devices; and a trolley wire supported by said suspensiondevices.

3. In an apparatus of the class described, the combination of amessenger wire; loops normally loose on the messenger wire; suspensiondevices pivotally connected with the loops respectively and each havinga member adapted to gri the messenger Wire upon the oscillation o thesuspension devices; and a trolley wire connected with said suspensiondevices.

t. In an apparatus of the class described, the combination of amessenger wire; a trolley wire; hangers normally loose on the messengerwire and connected with the trolley wire and each having a membereffective to grip the messenger wire upon the parting of the trolleywire.

In witness whereof I have hereunto signed my name, at Springfield,Illinois, this 19th day of December, 1914:.

CHARLES H. ROBERTSON.

Witnesses:

S. ALLYNN TROXELL, W. C. K. KENDALL.

